Leather product



July 17, 1 928. 1,677,125

' M. H. COOK LEATHER PRODUCT Filed June 26, 1926 IN VEN TOR.

A TTORNEYS.

the belt and the surface of the pulley.

Patented July 17,

UNITED sures 7 1, 71,125v PATENT o-Fnce.

matron n. eoox, or m FRANCIS-C0, curromvm. ASSIGNOB are THE :1. 1w. coox mmrme COMPANY, or sax rmnoxscooanronmn, A coaroaarrou or can- LEATHER Application Jane 26,

This invention relates to a leather product. The present invention is concernedwith means for utilizing a by-product incident to the production of leather and leather articles, and which product is now used mainly as fertilizer or is burned in the furnaces ofthe plants where it is produced. In the manufacture of leather articles large. quan-- l0 tities of leather dust, shavings and small unuseful pieces of leather are produced, and

- it is the principal object ofthe present, in-

vention to provide means whereby this 9 leather maybecaused to serve a useful purpose in the manufacture of articles or as a coating or covering for articles-used for various urposes. Such, for example, as the rovisionof a. leather coating for belt pul-' eys. thus increasing the traction between The present invention contemplates the useof leather dustand fine leather particles which have been produced incident to the operation ofleather cutting machines or directly from small unuseful pieces of leather, and which leather, particles may be applied to surfaces or may be combined with other materials to form' useful articles in manufacture. v I Theinvention is illustrated by way of example in the accompanying drawings, in

which: a Fig. 1 is a view in perspective showing a sheet of material embodying the present invention.

Fig. 2 .is a view in transverse section through a leather shoe showing one application of the present invention to shoe construction. v

' Fig. 3 is a view in perspective showin an application of the invention to a beltpu ley. It is to be understood that the present-in-r vention is particularly concerned with the useful utilizationof small waste leather particles. Two examples of such use are shown in the :drawings,'although other, applicafl 'tionsrof the invention may occur to othersskilled in the art. and it is to be considered that they are within the scope of the invention as here disclosed. Referring to: Figs. 1 and 520i the drawings the leather produce isshown as a coating for sheets of celluloid and by which con struction a leather coated water-proof prodraopuor.

1926. Serial 110. 118,784.

J p not is provided which 1s suitable for use as an intermediate sole in the manufacture of shoes, as shown in my Patent #1,309,461.

In Fig. 3 of the drawings, the application of the leather coating is shown as applied to the friction surface of a belt. pulley and in which instance the use of belt ressings and like preparations is eliminated.

Referring more particularly to the draw- The dust is applied to the celluloid in the following manner: The celluloid is treated with a solvent or varnish, as by dipping, spraying 'or brushing. This may be done, for example, by dipping-sheets of celluloid into a vat of the solvent or by running strips of celluloid through the vat by sbme mechanicalmeans. The solvent may bespar varnish, acetone, ether or some other agent alcohol being used to retard the coating-action. Mixed with this solvent is a small ing, 10 indicates a sheet of celluloid of any amount of dissolved celluloid. This willgive consistence to the solution ia'nd at the same time will prevent undue penetration of the solvent i nto the body of the sheet of celluloid. A mixture of alcohol and shellac or any combination of that nature may be used where a heavy coat of leather dust is required. 4

By treating the surfraee of ,the'sheet of celluloid with the solvent it will be apparent that the surface of the celluoid will become tack sprin led or blown against the surface and will adhere thereto. This dust will then absorb a large amount of the moisture of the solvent which will be rapidly drying, due to the nature of the chemicals used. When the solvent 'is sufliciently dry to hold the dust the sheets of celluloid which have been thus The leather dustmay then be v coated are disposed between pressure plates same manner as the first. After the .drying I action has been completed it will be found that the o posite faces of the celluloid will bear a substantially permanent coating of leather and that these leather surfaces will form a suitablebond with other pieces of leather and cement. At the same time it will be understood that by treating the cement in this manner it is not liable to explode, although it would burn.

Byreference to Fig. 2 an application of the present invention may be seen. Here the insole is indicated at 13, the lower or outer sole at 14 and the composition sheet of material at '15. By this construction -it is possible to prevent moisture from penetrating through the sole 14 to the insole 13, and at the sametime it is' possible to glue the soles 13 and 14 to the leather surfaces of the insulating sheet 15 without difficulty. It is to be understood that this material lends itself readily to various uses other than in.

the manufacture of shoes, as, for example, insulating liningsfor leather goods and containers. '1

' Inapplying a coating of the finely divided leather to metal surfaces, such, for example, as when applying a leather coatingto the friction surface of a belt pulley the metal is 1 first cleaned by the use of acetic acid or some other suitable cleansing material. It is then preferable to slightly roughen the surface and to permit the surface to dr during which, time a slight oxidization wi take place to form a thin coatin of ruston the surface. When'this is dry, s ellac, glue,

or other binder may be applied to the surface, and while it is still wet the finely ground leather may be sprinkled or blown onto the surface or a plied in any other convenient manner. A ter the binder has become dry, it has been found that the pulley possesses a friction surface over which the elt passes and with which the belt acquires increased traction. V

It will also be understood that in certain instances it may be found advantageous to mix the leather particles with the material which is intended to act as a. binder for the particles and to cause the particles to adhere to the surface.

While I have shown the preferred form of my invention, it is to be understood that various changes may be made in its construction by those skilled in the art without departin from the spirit of the invention, as defined in the a pended claims.

Having thus escribed my invention, what I claim and desire to secure by Letters Patent is:

1. An article of manufacture comprisin a sheet of celluloid, having a surface coate with granulated a'rticla of leather, the celluloid material of the surface constitutin a binder for holding the granulated partic es together and to the said surfaces.

1 2. An article of manufacture'comprising a sheet of celluloid having a surface thereof covered with particles of granulated leather, said particles beingheld upon the sheet of material by the celluloid at the surface, portions of the celluloid material at the said surfaces constituting a binder for the granulated leather.

. MILTON H. COOK. 

